Reconfigurable electric drive topological structure

Abstract

The invention belongs to the technical field of vehicle transmission, and particularly relates to a reconfigurable electric drive topological structure which is based on four driving motors, four clutches and six planet rows, and realizes module universality among different platforms of a wheeled vehicle and a tracked vehicle by freely combining different driving motors, different operating parts and planet rows. Module universality among platforms with different power levels is realized, the generalization rate is greatly improved, and the pressure of army logistics support is reduced. According to the reconfigurable electric drive topological structure, four transmission schemes are achieved by freely combining different parts, the requirements of different use scenes are met, and the four transmission schemes comprise the light hub electric drive transmission scheme, the heavy hub electric drive transmission scheme, the light tracked vehicle electric drive transmission scheme and the heavy tracked vehicle electric drive transmission scheme. The structure effectively overcomes the defect that a low-temperature working condition transmission system can be combined with a wet clutch to achieve gear shifting only by being heated, and the adaptability of the transmission system under the low-temperature working condition is greatly improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle transmission, and in particular relates to a reconfigurable electric drive topology structure, which can be used for transmission of wheeled and tracked vehicles of different tonnages through the combination of different units. Background Art

[0002] The electric drive system has changed the functional limitations of the traditional transmission driven by a single mechanical energy, and has achieved the dual functions of satisfying its own high-speed propulsion and providing sufficient electrical energy, which has broad application value. The current electric drive solution has the problems of strong pertinence and narrow application, and it is urgent to carry out research on new reconfigurable topological configurations. As military changes have put forward higher and higher requirements for equipment support, the demand for universalization rate, autonomous control, modular design, etc. has become increasingly strong. The transmission system topology design method based on platform traction is difficult to adapt to the rapid changes in demand under new technological conditions. A new concept of open configuration is proposed, and a reconfigurable electric drive topology structure with open and scalable architecture, universal and portable modules, and rapid access to new technologies is adopted to adapt to the rapid evolution of various new combat platforms, which has become a technical bottleneck for the industry's advanced layout. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] The technical problem to be solved by the present invention is: in view of the above analysis, how to provide a new type of reconfigurable electric drive topology structure, which is based on four drive motors, four clutches, and six planetary gears. By freely combining different drive motors, different operating parts and planetary gears, it can achieve module commonality between different platforms of wheeled vehicles and tracked vehicles, and module commonality between platforms of different power levels, which can greatly improve the commonality rate and reduce the pressure on logistics support for the troops.

[0005] (II) Technical solution

[0006] In order to solve the above technical problems, the present invention provides a reconfigurable electric drive topology structure, which includes: a planetary mechanism, a shift control component and a drive motor;

[0007] The planetary mechanism includes: planet row P1, planet row P2, planet row P3, planet row P4, planet row P5, and planet row P6; wherein the planet row P1 is the same as the planet row P6, the planet row P2 is the same as the planet row P5, and the planet row P3 is the same as the planet row P4;

[0008] The shift operating components include: clutch C1, clutch C2, clutch C3, clutch C4; wherein clutch C1 is the same as clutch C4, and clutch C2 is the same as clutch C3;

[0009] The drive motors include: motor AL, motor BL, motor AR, and motor BR;

[0010] The motor AL is the same as the motor AR, and the motor BL is the same as the motor BR;

[0011] Motor AL, motor BL, planetary gear P1, planetary gear P2, clutch C1, clutch C2 are placed on the left side of the topological structure; both motors are connected to two planetary gears and two clutches;

[0012] Motor AR, motor BR, planetary gear P5, planetary gear P6, clutch C3, clutch C4 are placed on the right side of the topological structure; both motors are connected to two planetary gears and two clutches;

[0013] The planet row P3 is placed on the left side of the middle of the topological structure, and is connected to the planet row P2 and the planet row P4 respectively;

[0014] The planetary row P4 is placed on the right side of the middle of the topological structure, and is connected to the planetary row P5 and the planetary row P3 respectively;

[0015] By combining the above drive motors, clutches and planetary gears, four transmission schemes can be realized to meet the needs of different usage scenarios, namely, light wheel hub electric drive transmission scheme, heavy wheel hub electric drive transmission scheme, light tracked vehicle electric drive transmission scheme, and heavy tracked vehicle electric drive transmission scheme.

[0016] Among them, the light hub electric drive transmission scheme is realized by combining the motor AL, the clutch C2, and the planetary gear P2. The output power of the motor AL is combined with the clutch C2 to realize the first-level deceleration of the planetary gear P2, and the power is output; the forward and reverse rotation of the motor AL is controlled to realize the forward and reverse movement of the vehicle.

[0017] Among them, the heavy-duty hub electric drive transmission scheme is realized by combining motor AL, motor BL, clutch C1, planetary gear P1 and planetary gear P2; when clutch C1 adopts a wet clutch, the connection between clutch C1 and the housing is realized by filling the transmission system with oil; when clutch C1 is a one-way clutch, the clutch C1 is engaged or disengaged by adjusting the speed and torque of motor AL and motor BL; when clutch C1 is engaged, the transmission system realizes a low gear; when clutch C1 is opened, the transmission system realizes a high gear.

[0018] Under the heavy-duty wheel hub electric drive transmission scheme, when the one-way clutch is used in the low gear, both motors AL and BL adopt the torque control mode, and the motor target torque is analyzed according to the driving control signal; the torque of motor AL and motor BL is the same, the torque direction of motor AL is positive, and the torque direction of motor BL is negative;

[0019] When the one-way clutch is used in high gear, both motors AL and BL adopt the speed control mode, the speeds of the two motors are the same, and the motor target speeds are analyzed according to the driving control signal.

[0020] In the heavy-duty wheel hub electric drive transmission scheme, during the downshift process, the speed of motor AL is kept unchanged and the speed of motor BL is adjusted. B =-n A / k1, the speed of the inner ring of the clutch C1 located in the planetary carrier of the planetary row P1 drops to 0, and the corresponding output speed of the transmission system also drops; then, the control modes of the motors AL and BL are switched to torque control, and the low speed gear is entered to make the output torques of the motors AL and BL equal, the torque direction of the motor AL is positive, and the torque direction of the motor BL is negative, so as to ensure that the torque of the inner ring of the clutch C1 is less than 0, and the clutch C1 is in the engaged state; where n A Indicates the output speed of motor AL, n B represents the output speed of motor BL, k1 and k2 represent the characteristic parameters of planetary gear P1 respectively.

[0021] In the heavy-duty wheel hub electric drive transmission scheme, during the upshift process, the control mode of the two motors AL and BL is switched from torque control to speed control, the speed of motor AL is kept unchanged, and the speed direction of motor B is changed. As long as the absolute value of the speed of motor B is slightly greater than n A / k1, the speed of the inner ring of clutch C1 is greater than zero, and the one-way clutch is in a disengaged state; continue to increase the speed of motor BL, and when its speed direction and speed size are the same as those of motor AL, shift into high gear.

[0022] Among them, the electric drive transmission scheme of the light tracked vehicle is realized by combining motor AL, motor AR, clutch C2, clutch C3, planetary gear P2, and planetary gear P5. The output power of motor AL and motor AR is realized by combining clutch C2 and clutch C3 to achieve the first-level deceleration of planetary gear P2 and planetary gear P5, and the power is output; in the straight driving condition, the forward and reverse rotation of motor AL and motor AR is controlled to realize the forward and reverse movement of the vehicle; in the turning condition, the speed difference of motor AL and motor AR is controlled to realize the turning of the vehicle at different speeds and center turning.

[0023] Among them, by combining motor AL, motor BL, motor AR, motor BR; clutch C1, clutch C4; planetary gear P1, planetary gear P2, planetary gear P3, planetary gear P4, planetary gear P5, planetary gear P6, the electric drive transmission scheme of heavy tracked vehicles is realized;

[0024] When the clutch C1 and the clutch C4 are wet clutches, the clutch C1 and the clutch C4 are connected to the housing by filling the transmission system with oil;

[0025] When clutches C1 and C4 are one-way clutches, clutch C1 is engaged or disengaged by adjusting the speed and torque of motors AL and BL on the left, and clutch C4 is engaged or disengaged by adjusting the speed and torque of motors AR and BR on the right.

[0026] Under the electric drive transmission scheme for heavy-duty tracked vehicles, in straight-ahead conditions, motor AL and motor BL are controlled in the same way, motor AR and motor BR are controlled in the same way, and clutch C1 and clutch C4 operate in the same way; the system low-speed gear and high-speed gear are achieved by combining or separating C1 and C4; the low-speed gear, high-speed gear, and low-speed gear and high-speed gear switching strategies are consistent with the strategies in the heavy-duty hub electric drive transmission scheme.

[0027] Under the electric drive transmission scheme for heavy tracked vehicles, in the steering condition, the speed and torque of the motor AL and the motor BL on the left are controlled respectively, and the speed and torque of the motor AR and the motor BR on the right are controlled to achieve the speed difference between the planetary gear P3 frame and the planetary gear P4 frame, thereby achieving steering at different vehicle speeds and center steering.

[0028] (III) Beneficial effects

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] (1) The reconfigurable electric drive topology scheme is constructed by using six planetary gears, four clutches, and four motors, which can realize the free combination of light wheel hub electric drive transmission scheme, heavy wheel hub electric drive transmission scheme, light tracked vehicle electric drive transmission scheme, and heavy tracked vehicle electric drive transmission scheme. In specific series products, the structural parts can be widely used, and the universalization rate can be improved. This invention innovates the design method of the chariot electric drive topology configuration scheme from the dimension of a generalized system, realizes the functional reuse and reconfiguration between large and small platforms, and the universal and reconfigurable modules between wheel and track platforms, so as to meet the rapid response and flexible deployment of high-mobility platforms on land.

[0031] (2) The electric drive topology of the present invention controls the speed difference between the two ends of clutch C1 and clutch C4, so that the vehicle can smoothly connect the high-speed section and the low-speed section without cutting off the vehicle power during forward shifting, thereby reducing the shifting impact of the whole vehicle and meeting the high mobility requirements of heavy-duty wheel hub electric drive and heavy-duty tracked vehicle electric drive.

[0032] (3) If clutch C1 and clutch C4 use one-way clutches, it is possible to avoid configuring complex hydraulic systems such as pressure cylinders, effectively optimizing the traditional design scheme in which the transmission system under low-temperature conditions needs to be heated to combine with wet clutches C1 and C4 to achieve gear shifting and thus transmit power, thereby greatly improving the adaptability of the transmission system under low-temperature conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the light hub electric drive transmission structure.

[0034] Figure 2 This is a schematic diagram of the heavy-duty wheel hub electric drive transmission structure.

[0035] Figure 3 This is a schematic diagram of the electric drive transmission structure of a light tracked vehicle.

[0036] Figure 4 This is a schematic diagram of the electric drive transmission structure of a heavy tracked vehicle.

[0037] Figure 5 Schematic diagram of the theoretical speed of transmission components during the gear shifting process. DETAILED DESCRIPTION

[0038] In order to make the purpose, content, and advantages of the present invention more clear, the specific implementation methods of the present invention are further described in detail below in conjunction with the accompanying drawings and examples.

[0039] In order to solve the above technical problems, the present invention provides a reconfigurable electric drive topology structure, which includes: a planetary mechanism, a shift control component and a drive motor;

[0040] The planetary mechanism includes: planet row P1, planet row P2, planet row P3, planet row P4, planet row P5, and planet row P6; wherein the planet row P1 is the same as the planet row P6, the planet row P2 is the same as the planet row P5, and the planet row P3 is the same as the planet row P4;

[0041] The shift operating components include: clutch C1, clutch C2, clutch C3, clutch C4; wherein clutch C1 is the same as clutch C4, and clutch C2 is the same as clutch C3;

[0042] The drive motors include: motor AL, motor BL, motor AR, and motor BR;

[0043] The motor AL is the same as the motor AR, and the motor BL is the same as the motor BR;

[0044] Motor AL, motor BL, planetary gear P1, planetary gear P2, clutch C1, clutch C2 are placed on the left side of the topological structure; both motors are connected to two planetary gears and two clutches;

[0045] Motor AR, motor BR, planetary gear P5, planetary gear P6, clutch C3, clutch C4 are placed on the right side of the topological structure; both motors are connected to two planetary gears and two clutches;

[0046] The planet row P3 is placed on the left side of the middle of the topological structure, and is connected to the planet row P2 and the planet row P4 respectively;

[0047] The planetary row P4 is placed on the right side of the middle of the topological structure, and is connected to the planetary row P5 and the planetary row P3 respectively;

[0048] By combining the above drive motors, clutches and planetary gears, four transmission schemes can be realized to meet the needs of different usage scenarios, namely, light wheel hub electric drive transmission scheme, heavy wheel hub electric drive transmission scheme, light tracked vehicle electric drive transmission scheme, and heavy tracked vehicle electric drive transmission scheme.

[0049] Among them, the light hub electric drive transmission scheme is realized by combining the motor AL, the clutch C2, and the planetary gear P2. The output power of the motor AL is combined with the clutch C2 to realize the first-level deceleration of the planetary gear P2, and the power is output; the forward and reverse rotation of the motor AL is controlled to realize the forward and reverse movement of the vehicle.

[0050] Among them, the heavy-duty hub electric drive transmission scheme is realized by combining motor AL, motor BL, clutch C1, planetary gear P1 and planetary gear P2; when clutch C1 adopts a wet clutch, the connection between clutch C1 and the housing is realized by filling the transmission system with oil; when clutch C1 is a one-way clutch, the clutch C1 is engaged or disengaged by adjusting the speed and torque of motor AL and motor BL; when clutch C1 is engaged, the transmission system realizes a low gear; when clutch C1 is opened, the transmission system realizes a high gear.

[0051] Under the heavy-duty wheel hub electric drive transmission scheme, when the one-way clutch is used in the low gear, both motors AL and BL adopt the torque control mode, and the motor target torque is analyzed according to the driving control signal; the torque of motor AL and motor BL is the same, the torque direction of motor AL is positive, and the torque direction of motor BL is negative;

[0052] When the one-way clutch is used in high gear, both motors AL and BL adopt the speed control mode, the speeds of the two motors are the same, and the motor target speeds are analyzed according to the driving control signal.

[0053] In the heavy-duty wheel hub electric drive transmission scheme, during the downshift process, the speed of motor AL is kept unchanged and the speed of motor BL is adjusted. B =-n A / k1, the speed of the inner ring of the clutch C1 located in the planetary carrier of the planetary row P1 drops to 0, and the corresponding output speed of the transmission system also drops; then, the control modes of the motors AL and BL are switched to torque control, and the low speed gear is entered to make the output torques of the motors AL and BL equal, the torque direction of the motor AL is positive, and the torque direction of the motor BL is negative, so as to ensure that the torque of the inner ring of the clutch C1 is less than 0, and the clutch C1 is in the engaged state; where n A Indicates the output speed of motor AL, n B represents the output speed of motor BL, k1 and k2 represent the characteristic parameters of planetary gear P1 respectively.

[0054] In the heavy-duty wheel hub electric drive transmission scheme, during the upshift process, the control mode of the two motors AL and BL is switched from torque control to speed control, the speed of motor AL is kept unchanged, and the speed direction of motor B is changed. As long as the absolute value of the speed of motor B is slightly greater than n A / k1, the speed of the inner ring of clutch C1 is greater than zero, and the one-way clutch is in a disengaged state; continue to increase the speed of motor BL, and when its speed direction and speed size are the same as those of motor AL, shift into high gear.

[0055] Among them, the electric drive transmission scheme of the light tracked vehicle is realized by combining motor AL, motor AR, clutch C2, clutch C3, planetary gear P2, and planetary gear P5. The output power of motor AL and motor AR is realized by combining clutch C2 and clutch C3 to achieve the first-level deceleration of planetary gear P2 and planetary gear P5, and the power is output; in the straight driving condition, the forward and reverse rotation of motor AL and motor AR is controlled to realize the forward and reverse movement of the vehicle; in the turning condition, the speed difference of motor AL and motor AR is controlled to realize the turning of the vehicle at different speeds and center turning.

[0056] Among them, by combining motor AL, motor BL, motor AR, motor BR; clutch C1, clutch C4; planetary gear P1, planetary gear P2, planetary gear P3, planetary gear P4, planetary gear P5, planetary gear P6, the electric drive transmission scheme of heavy tracked vehicles is realized;

[0057] When the clutch C1 and the clutch C4 are wet clutches, the clutch C1 and the clutch C4 are connected to the housing by filling the transmission system with oil;

[0058] When clutches C1 and C4 are one-way clutches, clutch C1 is engaged or disengaged by adjusting the speed and torque of motors AL and BL on the left, and clutch C4 is engaged or disengaged by adjusting the speed and torque of motors AR and BR on the right.

[0059] Under the electric drive transmission scheme for heavy-duty tracked vehicles, in straight-ahead conditions, motor AL and motor BL are controlled in the same way, motor AR and motor BR are controlled in the same way, and clutch C1 and clutch C4 operate in the same way; the system low-speed gear and high-speed gear are achieved by combining or separating C1 and C4; the low-speed gear, high-speed gear, and low-speed gear and high-speed gear switching strategies are consistent with the strategies in the heavy-duty hub electric drive transmission scheme.

[0060] Under the electric drive transmission scheme for heavy tracked vehicles, in the steering condition, the speed and torque of the motor AL and the motor BL on the left are controlled respectively, and the speed and torque of the motor AR and the motor BR on the right are controlled to achieve the speed difference between the planetary gear P3 frame and the planetary gear P4 frame, thereby achieving steering at different vehicle speeds and center steering.

[0061] Example 1

[0062] A new reconfigurable electric drive topology structure of this embodiment includes: a planetary mechanism, a shift control component, a drive motor, and a hydraulic deceleration component. The planetary mechanism includes: planetary row P1, planetary row P2, planetary row P3, planetary row P4, planetary row P5, and planetary row P6; wherein the planetary row P1 is the same as the planetary row P6, the planetary row P2 is the same as the planetary row P5, and the characteristic parameters of the planetary row P3 and the planetary row P4 are the same. The shift control component includes: clutch Cl, clutch C2, clutch C3, clutch C4; wherein the clutch Cl is the same as the clutch C4, and the clutch C2 is the same as the clutch C3. The drive motor includes: motor AL, motor BL, motor AR, and motor BR. wherein the motor AL is the same as the motor AR, and the motor BL is the same as the motor BR. By combining the above drive motors, clutches, and planetary rows, four transmission schemes can be realized to meet the needs of different usage scenarios, namely, a light wheel hub electric drive transmission scheme, a heavy wheel hub electric drive transmission scheme, a light tracked vehicle electric drive transmission scheme, and a heavy tracked vehicle electric drive transmission scheme.

[0063] Lightweight wheel hub electric drive transmission scheme: Lightweight wheel hub electric drive is achieved by combining motor AL, clutch C2, and planetary gear P2. The output power of motor AL is combined with clutch C2 to achieve the first-level reduction of planetary gear P2, and the power is output. The forward and reverse rotation of motor AL is controlled to achieve forward and reverse movement of the vehicle.

[0064] Heavy-duty wheel hub electric drive transmission scheme: Heavy-duty wheel hub electric drive is achieved by combining motor AL, motor BL, clutch C1, planetary gear P1, and planetary gear P2. If clutch C1 adopts a wet clutch, the connection between clutch C1 and the housing can be achieved by filling the system with oil. If clutch C1 is a one-way clutch, the clutch C1 is engaged or disengaged by adjusting the speed and torque of motor AL and motor BL. When clutch C1 is engaged, the system achieves low gear; when clutch C1 is open, the system achieves high gear.

[0065] When the one-way clutch is used in low gear, both motors adopt torque control mode, and the motor target torque is analyzed according to the driving control signal. The torque of motor AL and motor BL is the same, the torque direction of motor AL is positive, and the torque direction of motor BL is negative.

[0066] When a one-way clutch is used in high gear, both motors adopt speed control mode, the speeds of the two motors are the same, and the motor target speed is analyzed based on the driving control signal.

[0067] When clutch C1 is a one-way clutch, the switching strategy between low gear and high gear is:

[0068] During the switching process, both motor AL and motor BL adopt speed control, such as Figure 5 As shown. Where k1 and k2 represent the characteristic parameters of planetary gear P1 and planetary gear P2 respectively, n A Indicates the output speed of motor AL, n * Indicates the output speed of motor AL before shifting, n B Indicates the output speed of motor BL, n out Indicates the output speed of the planetary gear ring P2, n j1 Indicates the output speed of the planetary gear P1. The time period from t1 to t2 is the downshift process from high gear to low gear. The time period from t3 to t4 is the upshift process from low gear to high gear.

[0069] The time period from t1 to t2 is the downshift process. The speed of motor AL is kept unchanged and the speed of motor BL is adjusted. B =-n A / k1, the speed of the clutch inner ring (planetary gear P1 planet carrier) drops to 0, and the corresponding system output speed also drops. After that, the control mode of the two motors is switched to torque control, and the low speed gear is entered to make the output torque of the two motors equal, the torque direction of motor AL is positive, and the torque direction of motor BL is negative, to ensure that the torque of the clutch inner ring is less than 0 and the clutch is in the engaged state. The time period t3~t4 is the upshift process, and the control mode of the two motors is switched from torque control to speed control, keeping the speed of motor AL unchanged, and changing the speed direction of motor B. As long as the absolute value of the speed of motor B is slightly greater than n A / k1, the speed of the clutch inner ring is greater than zero, and the one-way clutch is in a disengaged state. Continue to increase the speed of motor BL, and when its speed direction and speed size are the same as those of motor AL, shift into high gear.

[0070] Light tracked vehicle electric drive transmission scheme: The light tracked vehicle is electrically driven by combining motor AL, motor AR, clutch C2, clutch C3, planetary gear P2, and planetary gear P5. The output power of motor AL and motor AR is combined with clutch C2 and C3 to achieve the first-level reduction of planetary gear P2 and P5, and the power is output. In straight driving conditions, the forward and reverse rotation of motors AL and AR is controlled to achieve forward and reverse movement of the vehicle. In turning conditions, the speed difference between motors AL and AR is controlled to achieve vehicle steering at different speeds and center steering.

[0071] Heavy tracked vehicle electric drive transmission scheme: heavy tracked vehicle power transmission is achieved by combining motor AL, motor BL, motor AR, motor BR; clutch C1, clutch C4; planetary gear P1, planetary gear P2, planetary gear P3, planetary gear P4, planetary gear P5, and planetary gear P6. If clutch C1 and C4 are wet clutches, the connection between clutch C1 and C4 and the housing can be achieved by filling the system with oil. If clutch C1 and C4 are one-way clutches, clutch C1 is engaged or disengaged by adjusting the speed and torque of the left motor AL and motor BL, and clutch C1 is engaged or disengaged by adjusting the speed and torque of the right motor AR and motor BR.

[0072] In straight driving conditions, motor AL and motor BL are controlled in the same way, motor AR and motor BR are controlled in the same way, and clutch C1 and C4 operate in the same way. The system low gear and high gear are achieved by combining or separating C1 and C4. The low gear, high gear and low gear and high gear switching strategies are consistent with those in the heavy-duty hub electric drive transmission solution.

[0073] In the steering condition, the speed and torque of the left motor AL and motor BL are controlled respectively, and the speed and torque of the right motor AR and motor BR are controlled to achieve the speed difference between the P3 planetary gear frame and the P4 planetary gear frame, thereby realizing steering at different vehicle speeds and center steering.

[0074] In summary, the present invention belongs to the field of vehicle transmission technology, and specifically relates to a reconfigurable electric drive topology structure, which is based on four drive motors, four clutches, and six planetary gears. By freely combining different drive motors, different operating parts, and planetary gears, the modules between different platforms of wheeled vehicles and tracked vehicles can be universal, and the modules between platforms with different power levels can be universal, which can greatly improve the universalization rate and reduce the pressure of military logistics support. The reconfigurable electric drive topology structure of the present invention can realize 4 transmission schemes by freely combining different components to meet the needs of different usage scenarios, namely, light wheel hub electric drive transmission scheme, heavy wheel hub electric drive transmission scheme, light tracked vehicle electric drive transmission scheme, and heavy tracked vehicle electric drive transmission scheme. The invention innovates the design method of the chariot electric drive topology configuration scheme from the dimension of the generalized system, realizes the functional reuse and reconfiguration between large and small platforms, and the universal and reconfigurable modules between wheel and track platforms, which meets the rapid response and flexible deployment of high-mobility platforms on land. The operating part adopts a one-way clutch, which can avoid the configuration of complex hydraulic systems such as pressure cylinders, effectively changing the disadvantage that the transmission system in low-temperature conditions needs to be heated to combine with the wet clutch to achieve gear shifting, greatly improving the adaptability of the transmission system in low-temperature conditions.

[0075] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A reconfigurable electric drive topology structure, characterized in that: The reconfigurable electric drive topology structure includes: a planetary mechanism, a shift control component and a drive motor; The planetary mechanism includes: planet row P1, planet row P2, planet row P3, planet row P4, planet row P5, and planet row P6; wherein the planet row P1 is the same as the planet row P6, the planet row P2 is the same as the planet row P5, and the planet row P3 is the same as the planet row P4; The shift operating components include: clutch C1, clutch C2, clutch C3, clutch C4; wherein clutch C1 is the same as clutch C4, and clutch C2 is the same as clutch C3; The drive motors include: motor AL, motor BL, motor AR, and motor BR; The motor AL is the same as the motor AR, and the motor BL is the same as the motor BR; Motor AL, motor BL, planetary gear P1, planetary gear P2, clutch C1, clutch C2 are placed on the left side of the topological structure; both motors are connected to two planetary gears and two clutches; Motor AR, motor BR, planetary gear P5, planetary gear P6, clutch C3, clutch C4 are placed on the right side of the topological structure; both motors are connected to two planetary gears and two clutches; The planet row P3 is placed on the left side of the middle of the topological structure, and is connected to the planet row P2 and the planet row P4 respectively; The planetary row P4 is placed on the right side of the middle of the topological structure, and is connected to the planetary row P5 and the planetary row P3 respectively; By combining the above drive motors, clutches and planetary gears, four transmission schemes can be realized to meet the needs of different usage scenarios, namely, light wheel hub electric drive transmission scheme, heavy wheel hub electric drive transmission scheme, light tracked vehicle electric drive transmission scheme, and heavy tracked vehicle electric drive transmission scheme.

2. The reconfigurable electric drive topology structure according to claim 1, characterized in that: The light hub electric drive transmission scheme is realized by combining the motor AL, the clutch C2 and the planetary gear P2. The output power of the motor AL is combined with the clutch C2 to realize the first-stage reduction of the planetary gear P2, and the power is output; the forward and reverse rotation of the vehicle is realized by controlling the forward and reverse rotation of the motor AL.

3. The reconfigurable electric drive topology structure according to claim 1, characterized in that: A heavy-duty hub electric drive transmission scheme is realized by combining motor AL, motor BL, clutch C1, planetary gear P1 and planetary gear P2; when clutch C1 adopts a wet clutch, the connection between clutch C1 and the housing is realized by filling the transmission system with oil; when clutch C1 is a one-way clutch, the clutch C1 is engaged or disengaged by adjusting the speed and torque of motor AL and motor BL; when clutch C1 is engaged, the transmission system realizes a low gear; when clutch C1 is opened, the transmission system realizes a high gear.

4. The reconfigurable electric drive topology structure according to claim 3, characterized in that: Under the heavy-duty wheel hub electric drive transmission scheme, when the one-way clutch is used in the low gear, both motors AL and BL adopt the torque control mode, and the motor target torque is analyzed according to the driving control signal; the torque of motor AL and motor BL is the same, the torque direction of motor AL is positive, and the torque direction of motor BL is negative; When the one-way clutch is used in high gear, both motors AL and BL adopt the speed control mode, the speeds of the two motors are the same, and the motor target speeds are analyzed according to the driving control signal.

5. The reconfigurable electric drive topology structure according to claim 4, characterized in that: In the heavy-duty wheel hub electric drive transmission scheme, during the downshift process, the speed of motor AL is kept unchanged and the speed of motor BL is adjusted. B =-n A / k1, the speed of the inner ring of the clutch C1 located in the planetary carrier of the planetary row P1 drops to 0, and the corresponding output speed of the transmission system also drops; then, the control modes of the motors AL and BL are switched to torque control, and the low speed gear is entered to make the output torques of the motors AL and BL equal, the torque direction of the motor AL is positive, and the torque direction of the motor BL is negative, so as to ensure that the torque of the inner ring of the clutch C1 is less than 0, and the clutch C1 is in the engaged state; where n A Indicates the output speed of motor AL, n B represents the output speed of motor BL, k1 and k2 represent the characteristic parameters of planetary gear P1 respectively.

6. The reconfigurable electric drive topology structure according to claim 5, characterized in that: In the heavy-duty wheel hub electric drive transmission scheme, during the upshift process, the control mode of the two motors AL and BL is switched from torque control to speed control, the speed of motor AL is kept unchanged, and the speed direction of motor B is changed. As long as the absolute value of the speed of motor B is slightly greater than n A / k1, the speed of the inner ring of clutch C1 is greater than zero, and the one-way clutch is in a disengaged state; continue to increase the speed of motor BL, and when its speed direction and speed size are the same as those of motor AL, shift into high gear.

7. The reconfigurable electric drive topology structure according to claim 1, characterized in that: By combining motor AL, motor AR, clutch C2, clutch C3, planetary gear P2 and planetary gear P5, an electric drive transmission scheme for light tracked vehicles is realized. The output power of motor AL and motor AR is combined with clutch C2 and clutch C3 to realize the first-level reduction of planetary gear P2 and planetary gear P5, and the power is output; in straight driving conditions, the forward and reverse rotation of motor AL and motor AR is controlled to realize the forward and reverse movement of the vehicle; in turning conditions, the speed difference between motor AL and motor AR is controlled to realize the turning of the vehicle at different speeds and center turning.

8. The reconfigurable electric drive topology structure according to claim 6, characterized in that: By combining motor AL, motor BL, motor AR, motor BR; clutch C1, clutch C4; planetary gear P1, planetary gear P2, planetary gear P3, planetary gear P4, planetary gear P5, planetary gear P6, an electric drive transmission solution for heavy tracked vehicles is realized; When the clutch C1 and the clutch C4 are wet clutches, the clutch C1 and the clutch C4 are connected to the housing by filling the transmission system with oil; When clutches C1 and C4 are one-way clutches, clutch C1 is engaged or disengaged by adjusting the speed and torque of motors AL and BL on the left, and clutch C4 is engaged or disengaged by adjusting the speed and torque of motors AR and BR on the right.

9. The reconfigurable electric drive topology structure according to claim 8, characterized in that: Under the electric drive transmission scheme for heavy-duty tracked vehicles, in straight-ahead conditions, motor AL and motor BL are controlled in the same way, motor AR and motor BR are controlled in the same way, and clutch C1 and clutch C4 operate in the same way; the system low-speed gear and high-speed gear are achieved by combining or separating C1 and C4; the low-speed gear, high-speed gear, and low-speed gear and high-speed gear switching strategies are consistent with the strategies in the heavy-duty hub electric drive transmission scheme.

10. The reconfigurable electric drive topology structure according to claim 9, characterized in that: Under the electric drive transmission scheme for heavy tracked vehicles, in the steering condition, the speed and torque of the motor AL and the motor BL on the left are controlled respectively, and the speed and torque of the motor AR and the motor BR on the right are controlled to achieve the speed difference between the planetary gear P3 frame and the planetary gear P4 frame, thereby achieving steering at different vehicle speeds and center steering.

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